The one thing you need to be sure of doing, as I mentioned in a previous post above, is right-clicking on the note to examine it, so that Martin knows what it is. (This is the note that you used the pencil on to reveal the code.)

Then it's all about speed after you use Barbora's ID card on the machine to get the green light. You really don't get much time here to click the pencil note on the machine while the light is still on.

Just to enhance what Rushes said - it's important to left-click AND right-click on just about everything in Nibiru.

I originally played this game in the German version, but wrote a walkthrough in English. It was posted on another site and is gone now, but chances are it was pirated; er picked up; by some other site. I'll see if I can find it for you.

Be sure that you've clicked twice on the water initially, so that Martin comments both times. Only then use the flashlight on the water, and Martin should automatically locate where the oil can is and make a comment about it.

Did you give the mustard hotdog to her? She'll say straightaway how disgusting she thinks mustard is, and that she wants ketchup on it instead. So then when you go to the hotdog stand, Martin will have new dialogue and end up buying a plain hotdog.